How did Carl Hempel’s covering-law model explain historical events?

Carl Hempel’s covering-law model, also known as the deductive-nomological model, posits that explaining a historical event requires showing that it was a logical consequence of specific initial conditions and universal laws.12

Under this framework, to explain an event, a historian must:
* Identify the relevant boundary conditions (the specific circumstances surrounding the event).2
* Appeal to covering laws or general propositions that correlate the type of event being explained with its causes.31

Hempel argued that this structure mirrors the logic of scientific explanation, where an event is explained by demonstrating that it was expected to occur given the laws of nature and the established conditions. While Hempel acknowledged that historians often provide only "explanation sketches" rather than fully realized scientific proofs, he maintained that for historical explanations to be rationally assessed, they must rely on such general uniformities.12

Later, Hempel modified his position to include probabilistic laws, suggesting that an event could be explained if it was shown to be highly probable under the given conditions. This model remains a subject of significant debate in the philosophy of history, particularly regarding its applicability to human actions and unique historical occurrences.21